Patents by Inventor Motoyuki Taji

Motoyuki Taji has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Acceleration sensor and acceleration apparatus using acceleration sensor
    Patent number: 6530276
    Abstract: An acceleration sensor having a well controlled dispersion in the detection characteristics and improved detection characteristics in the low frequency detection comprises a first piezoelectric plate (11), a second piezoelectric plate (12) bonded to the first piezoelectric plate (11) by direct bonding, a first external electrode (13) provided on the main surface of the first piezoelectric plate (11) and a second external electrode (14) provided on the main surface of the second piezoelectric plate (12). The first piezoelectric plate (11) and the second piezoelectric plate (12) are bonded together with their polarization axes reversed to each other. Appearance of the acceleration sensor resembles to a letter “L” in the cross section; thickness of the supporting section (15) is greater than that of the rest part (free vibration section).
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: March 11, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hirofumi Tajika, Kazunari Nishihara, Koji Nomura, Motoyuki Taji, Yoshihiro Tomita
  • Acceleration sensor and acceleration apparatus using acceleration sensor
    Publication number: 20020078749
    Abstract: An acceleration sensor having a well controlled dispersion in the detection characteristics and improved detection characteristics in the low frequency detection comprises a first piezoelectric plate (11), a second piezoelectric plate (12) bonded to the first piezoelectric plate (11) by direct bonding, a first external electrode (13) provided on the main surface of the first piezoelectric plate (11) and a second external electrode (14) provided on the main surface of the second piezoelectric plate (12). The first piezoelectric plate (11) and the second piezoelectric plate (12) are bonded together with their polarization axes reversed to each other. Appearance of the acceleration sensor resembles to a letter “L” in the cross section; thickness of the supporting section (15) is greater than that of the rest part (free vibration section).
    Type: Application
    Filed: February 22, 2002
    Publication date: June 27, 2002
    Inventors: Hirofumi Tajika, Kazunari Nishihara, Koji Nomura, Motoyuki Taji, Yoshihiro Tomita
  • Acceleration sensor and acceleration apparatus using acceleration sensor
    Patent number: 6382026
    Abstract: An acceleration sensor having a well controlled dispersion in the detection, characteristics and improved detection characteristics in the low frequency detection comprises a first piezoelectric plate (11), a second piezoelectric plate (12) bonded to the first piezoelectric plate (11) by direct bonding, a first external electrode (13) provided on the main surface of the first piezoelectric plate (11) and a second external electrode (14) provided on the main surface of the second piezoelectric plate (12). The first piezoelectric plate (11) and the second piezoelectric plate (12) are bonded together with their polarization axes reversed to each other. Appearance of the acceleration sensor resembles to a letter “L” in the cross section; thickness of the supporting section (15) is greater than that of the rest part (free vibration section).
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: May 7, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hirofumi Tajika, Kazunari Nishihara, Koji Nomura, Motoyuki Taji, Yoshihiro Tomita